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Which of the following substances cause ...

Which of the following substances cause permanent hardness of water

A

`CaCl_(2)`

B

`Ca(HCO_(3))_(2)`

C

`CaCO_(3)`

D

All of these

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The correct Answer is:
A
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NARAYNA-HYDROGEN & ITS COMPOUNDS-CONCEPTUAL QUESTIONS
  1. The temporary hardness of water is due to the presence of

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  2. The permanent hardness of water is due to the presence of

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  3. Which of the following substances cause permanent hardness of water

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  4. The formula of Calgon is :

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  5. Temporary hardness of water can be removed by adding

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  6. The chemical formula of Zeolite is…….

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  7. When Zeolite (Hydrated sodium Alumininum silicate) is treated with har...

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  8. The formula of exhausted pemutit is

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  9. Permanent hardness of water cannot be removed by

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  10. Exhausted anion exchange resin is revived by using solution of

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  11. Exhausted cation exchange resin is regenerated by using solution of mo...

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  12. De-ionized water is prepared by the following method :

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  13. Both temporary annd permanent hardness can be removed by using

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  14. One of the electrolyte used for the manufacture of H(2)O(2) by electro...

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  15. In the preparation of H(2)O(2) by auto oxidation method the starting s...

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  16. Electrolysis of 50% H(2)SO(4) produces

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  17. Crystals at 100% H(2)O(2) is obtained by cooling 90% H(2)O(2) with.

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  18. What is the conc. of H(2)O(2) obtained by auto oxidation process?

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  19. Which one of the following is used for laboratory preparation of D(2)O...

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  20. H(2)O(2) is miscible with water in all proportions and forms a hydrate...

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